Dan Post Mammothboots are amazing in design, performance and comfort. The unique barnyard-acid resistant leather design delivers the wearer the best experience. The barnyard-acid resistant leather undergoes a tanning process to make it 3 times stronger and 2 1/2 times more abrasion resistant. This leather is better protected against barnyard chemicals, urine, manure, grease, and salt. Full grain leather upper, removable, machine washable, closed cell insole, and wave outsole make this boot perfect for all day wearing. Oil, heat and slip-resistant rubber outsole. Youwon't be disappointed with this new addition to the Cowboy Certified line you've come to know and love. 60 DAY COMFORT GUARANTEE THROUGH DAN POST.